Yeah I wanted to make clear that this is not my position ;). I do believe that if there is no authorized use of violence, the groups that dare to use violence could overthrow the unarmed state.
I think violence will be a part of human nature at least in the next couple of thousand years. The only way to actually stop all aggression within humankind you would need artificially change the DNA or the Brain and I am not really in favor of that.
Well, maybe legalizing Weed will help :D